Paramagnetic centers in graphene nanoribbons prepared from longitudinal unzipping of carbon nanotubes

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Abstract

Electron spin resonance (ESR) investigation of graphene nanoribbons (GNRs) prepared through longitudinal unzipping of multi-walled carbon nanotubes indicates the presence of C-related dangling bond centers, exhibiting paramagnetic features. ESR signal broadening from pristine or oxidized GNRs is explained in terms of unresolved hyperfine structure, and in the case of reduced GNRs, the broadening of the ESR signal can be due to enhancement of conductivity upon reduction. The spin dynamics observed from ESR line widthtemperature data reflect a variable range hopping mechanism through localized states, consistent with resistance-temperature data. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

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Rao, S. S., Stesmans, A., Kosynkin, D. V., Higginbotham, A., & Tour, J. M. (2011). Paramagnetic centers in graphene nanoribbons prepared from longitudinal unzipping of carbon nanotubes. New Journal of Physics, 13. https://doi.org/10.1088/1367-2630/13/11/113004

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